Jefferson County, KY Weather and Hourly Weather


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Specific and detailed farm-by-farm weather forecast information is available in your Point Ag Forecast. New County Ag Weather Page,
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Regional Hourly Observations For JEFFERSON County, Kentucky
Issued at 600 AM EDT SUN MAY 18 2025
NORTH CENTRAL KENTUCKY CITY SKY/WX TMP DP RH WIND PRES REMARKS LOUISVILLE/SDF CLOUDY 60 52 74 W6 29.92R LOUISVILLE/LOU CLOUDY 58 52 80 W3 29.92R FORT KNOX MOCLDY 56 54 92 W3 29.91R

KY Round-up, Current Temperatures, Dewpoint, Rh, Wind, Regional Obs., Station Model, Surface 4-Panel, NWS Louisville
Meteograms: Paducah , Evansville , Bowling Green , Hopkinsville , Frankfort , Louisville , Lexington , Covington , Jackson , London , Shelby Co. Weather , Spindletop Research Weather Station , Woodford Co. Research Weather Station , About Meteograms
Current Agriculture, Lawn & Garden Weather Conditions in Kentucky
Based on observations at 600am EDT, Sunday May 18, 2025

Across Kentucky...temperatures are near 61 degrees west, near 55 degrees central, and near 58 degrees east. Current sky conditions are mostly cloudy west, mostly cloudy central, and partly cloudy east. In the west, relative humidity is near 90%, and the dew point is near 58 degrees. In the central part of the state, relative humidity is near 89%, and the dew point is near 52 degrees. In the east, relative humidity is near 78%, and the dew point is near 51 degrees. Current drying conditions are poor west, poor central, and fair east. The livestock heat stress category is no stress west, no stress central, and no stress east. Winds are calm west, where conditions are favorable for spraying. Winds are from the south at 3 mph central, where conditions are favorable for spraying. Winds are calm east, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 62 degrees at Hopkinsville and Bowling Green. The lowest temperature is 55 degrees at Somerset and Lexington.
List of Agriculture, Lawn & Garden Weather Observations in Kentucky

Current NOWCAST not available:
Nowcasts are not issued routinely during fair weather. Only when
precipitation or other significant weather is occuring in this county will these
forecasts be issued. Currently, there is no short term forecast in effect.

UKAWC Radar, NWS Radar (NEW!), SPC Radar, Regional Radar, NEXRAD, LSI Heat Index
Hazardous Weather Outlook For JEFFERSON County, Kentucky
Issued at: Sun May 18 03:35:59 AM EDT 2025

335 AM EDT Sun May 18 2025 /235 AM CDT Sun May 18 2025/ This Hazardous Weather Outlook is for portions of southern Indiana and central Kentucky. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Showers and thunderstorms will be possible Monday through Tuesday night. Some of the storms could be strong to severe, especially on Tuesday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed Monday and Tuesday. && More information, along with other weather, hydrological and climate information can be found, at weather.gov/louisville.
NWS Severe Weather Map , Convective Outlook

RDF forecast not available NEW NWS Experimental Weather Activity Planner: West, Central, East
NWS Experimental Point Forecasts (5 km x 5 km grid for Kentucky): West, Central, East

JEFFERSON County, Kentucky Agriculture, Lawn & Garden Weather Advisory

Updated: 310 AM EST THU NOV 12 2009

TODAY (6AM-5PM)
Max Temperature...........................61 degrees.
Precipitation (liq. eq. )...................0.00 inches (No rainfall).
Precipitation area .........................0% of the county expected.
Dewpoints.......................................29 to 34 Degrees.
Min RH (Relative Humidity).........37%.
Wind Speed....................................4 to 10 mph
Winds@3 PM..................................northeast at 10 mph
Spraying Conditions....................favorable
Sky Conditions @9 AM ...............mostly sunny.
RH < 50%........................................ for 7 hours
RH > 80%.........................................for 0 hour
No. of Hours Temp <=32 .............0
No. of Hours Temp <= 20 .............0
No. of Hours Temp <= 0 ...............0

The high today (6am-5pm) in Jefferson county, is expected to be near 61 degrees. No rainfall is expected. Temperature will range from near 39 to near 60 degrees. Dewpoints will range from 29 to 34 degrees. These dewpoints will combine with today (6am-5pm)'s temperatures resulting in relative humidity minimum of 37%. Skies will be mostly sunny at 9 AM and mostly sunny at 3 PM. Wind speed will range from 4 to 10 mph during the period. Winds at 3 PM will be out of the northeast at 10 mph, which is favorable spraying conditions in rain-free areas. Relative humidity will be less than 50% for 7 hours and greater than 80% for 0 hour

TONIGHT (6PM-5AM)
Min Temperature...........................38 degrees.
Precipitation (liq. eq. )...................0.00 inches (No rainfall).
Precipitation area .........................0% of the county expected.
Dewpoints.......................................near 34 Degrees.
Max RH (Relative Humidity)........76%.
Wind Speed....................................2 to 8 mph
Winds@3 AM..................................northeast at 3 mph
Spraying Conditions....................favorable
Sky Conditions @12 AM .............clear.
Sky Conditions @3 AM ...............clear.
RH < 50%........................................ for 1 hour
RH > 80%.........................................for 0 hour
No. of Hours Temp <=32 .............0
No. of Hours Temp <= 20 .............0
No. of Hours Temp <= 0 ...............0

The low tonight (6pm-5am) in Jefferson county, is expected to be around 38 degrees. No rainfall is expected. Temperature will range from near 41 to near 53 degrees. Dewpoints will be near 34 degrees. These dewpoints will combine with tonight (6pm-5am)'s temperatures resulting in relative humidity maximum of 76%. Skies will be clear at 12 AM and clear at 3 AM. Wind speed will range from 2 to 8 mph during the period. Winds at 3 AM will be out of the northeast at 3 mph, which is favorable spraying conditions in rain-free areas. Relative humidity will be less than 50% for 1 hour and greater than 80% for 0 hour

TOMORROW (6AM-5PM)
Max Temperature...........................64 degrees.
Precipitation (liq. eq. )...................0.00 inches (No rainfall).
Precipitation area .........................0% of the county expected.
Dewpoints.......................................34 to 42 Degrees.
Min RH (Relative Humidity).........41%.
Wind Speed....................................2 to 5 mph
Winds@3 PM..................................southeast at 3 mph
Spraying Conditions....................favorable
Sky Conditions @9 AM ...............mostly sunny.
Sky Conditions @3 PM ...............mostly sunny.
RH < 50%........................................ for 5 hours
RH > 80%.........................................for 2 hours
No. of Hours Temp <=32 .............0
No. of Hours Temp <= 20 .............0
No. of Hours Temp <= 0 ...............0

The high tomorrow (6am-5pm) in Jefferson county, is expected to be near 64 degrees. No rainfall is expected. Temperature will range from near 41 to near 64 degrees. Dewpoints will range from 34 to 42 degrees. These dewpoints will combine with tomorrow (6am-5pm)'s temperatures resulting in relative humidity minimum of 41%. Skies will be mostly sunny at 9 AM and mostly sunny at 3 PM. Wind speed will range from 2 to 5 mph during the period. Winds at 3 PM will be out of the southeast at 3 mph, which is favorable spraying conditions in rain-free areas. Relative humidity will be less than 50% for 5 hours and greater than 80% for 2 hours

TOMORROW NIGHT (6PM-5AM)
Min Temperature...........................46 degrees.
Precipitation (liq. eq. )...................0.00 inches (No rainfall).
Precipitation area .........................0% of the county expected.
Dewpoints.......................................42 to 44 Degrees.
Max RH (Relative Humidity)........89%.
Wind Speed....................................2 to 3 mph
Winds@3 AM..................................south at 2 mph
Spraying Conditions....................favorable
Sky Conditions @12 AM .............mostly clear.
Sky Conditions @3 AM ...............mostly clear.
RH < 50%........................................ for 0 hour
RH > 80%.........................................for 3 hours
No. of Hours Temp <=32 .............0
No. of Hours Temp <= 20 .............0
No. of Hours Temp <= 0 ...............0

The low tomorrow night (6pm-5am) in Jefferson county, is expected to be around 46 degrees. No rainfall is expected. Temperature will range from near 47 to near 59 degrees. Dewpoints will range from 42 to 44 degrees. These dewpoints will combine with tomorrow night (6pm-5am)'s temperatures resulting in relative humidity maximum of 89%. Skies will be mostly clear at 12 AM and mostly clear at 3 AM. Wind speed will range from 2 to 3 mph during the period. Winds at 3 AM will be out of the south at 2 mph, which is favorable spraying conditions in rain-free areas. Relative humidity will be less than 50% for 0 hour and greater than 80% for 3 hours

72 HOUR SUMMARY
The temperature is expected to be in the range from 38 degrees and 67 degrees. Dewpoints will range from 29 to 47 degrees. No measurable precipitation is expected.

Ag. Weather Forecast Parameter Maps:Spraying Conditions , Dewpoint Temperatures, Livestock Heat Stress

Extended Digital forecast not available
Current FORECAST not available TWC Forecast, NWS Maps, Fire Danger, Day 1 Precip, Day 2, 5 Day Total, Days 1-5
NGM 60 Hr Forecast Meteograms: Paducah , Evansville , Bowling Green , Hopkinsville , Frankfort , Louisville , Lexington , Covington , Jackson , London, All Kentucky Hourly Model Guidance, About NGM Forecast Meteograms
Kentucky Agricultural Weather Medium-Range Outlook (Based on the MEX Model)

MEDIUM RANGE AG FORECAST:
- Click here for Graphical Ag. Weather Forecast -

SATURDAY :
Highs across the state will range from 0 West and 0 Central, to 0 East. Dewpoints will range from (% to 0/ West, (% to 0/ Central, and (% to 0/ East throughout the day. Rainfall amounts of 0 inches over (F)% of the area West, 0 inches over (F)% of the area Central, and 0 inches over (F)% of the area East should be expected. Lows Saturday will fall to 0/ West, 0/ Central, and 0/ East. Skies throughout the day will start out and end in the West, start and end Central, and start out and end East. The maximum livestock stress category will be West, Central, and East. There will be 0 corn growing degree days West, 0 Central, and 0 East. Wind speeds in the morning and afternoon will be around and mph , respectively, West, and mph Central, and and mph East.
SATURDAY :
Highs across the state will range from 0 West and 0 Central, to 0 East. Dewpoints will range from to 0/ West, to 0/ Central, and to 0/ East throughout the day. Rainfall amounts of 0 inches over 0/ % of the area West, 0 inches over 0/ % of the area Central, and 0 inches over 0/ % of the area East should be expected. Lows Saturday will fall to 0/ West, 0/ Central, and 0/ East. Skies throughout the day will start out and end in the West, start and end Central, and start out and end East. The maximum livestock stress category will be West, Central, and East. There will be 0 corn growing degree days West, 0 Central, and 0 East. Wind speeds in the morning and afternoon will be around and mph , respectively, West, and mph Central, and and mph East.
SATURDAY :
Highs across the state will range from 0 West and 0 Central, to 0 East. Dewpoints will range from to 0/ West, to 0/ Central, and to 0/ East throughout the day. Rainfall amounts of 0 inches over 0 % of the area West, 0 inches over 0 % of the area Central, and 0 inches over 0 % of the area East should be expected. Lows Saturday will fall to 0/ West, 0/ Central, and 0/ East. Skies throughout the day will start out and end in the West, start and end Central, and start out and end East. The maximum livestock stress category will be West, Central, and East. There will be 0 corn growing degree days West, 0 Central, and 0 East. Wind speeds in the morning and afternoon will be around and mph , respectively, West, and mph Central, and and mph East.
SATURDAY :
Highs across the state will range from 0 West and 0 Central, to 0 East. Dewpoints will range from to 0/ West, to 0/ Central, and to 0/ East throughout the day. Rainfall amounts of inches over 0/ % of the area West, inches over 0/ % of the area Central, and inches over 0/ % of the area East should be expected. Lows Saturday will fall to 0/ West, 0/ Central, and 0/ East. Skies throughout the day will start out and end in the West, start and end Central, and start out and end East. The maximum livestock stress category will be West, Central, and East. There will be 0 corn growing degree days West, 0 Central, and 0 East. Wind speeds in the morning and afternoon will be around and mph , respectively, West, and mph Central, and and mph East.
SATURDAY :
Highs across the state will range from 0 West and 0 Central, to 0 East. Dewpoints will range from to 0/ West, to 0/ Central, and to 0/ East throughout the day. Rainfall amounts of inches over 0 % of the area West, inches over 0 % of the area Central, and inches over 0 % of the area East should be expected. Lows Saturday will fall to 0/ West, 0/ Central, and 0/ East. Skies throughout the day will start out and end in the West, start and end Central, and start out and end East. The maximum livestock stress category will be West, Central, and East. There will be corn growing degree days West, Central, and East. Wind speeds in the morning and afternoon will be around and mph , respectively, West, and mph Central, and and mph East.
SATURDAY :
Highs across the state will range from West and Central, to East. Dewpoints will range from to 0/ West, to 0/ Central, and to 0/ East throughout the day. Rainfall amounts of inches over 0/ % of the area West, inches over 0/ % of the area Central, and inches over 0/ % of the area East should be expected. Lows Saturday will fall to West, Central, and East. Skies throughout the day will start out and end in the West, start and end Central, and start out and end East. The maximum livestock stress category will be West, Central, and East.There will be corn growing degree days West, Central, and East. Wind speeds in the morning and afternoon will be around and mph, respectively, West, and mph Central, and and mph East.
Raw Data: MEX(west), MEX(central), MEX(east)

* NOTE: See specific site Ag Wx Data and Summary files for further information.
Graphic Regional Ag. Weather Outlook, Tabular data for the Medium Range Outlook

Medium & Long Range Outlook For Kentucky
KENTUCKY --------------------------------------------- 6 TO 10 DAY 8 TO 14 DAY 30 DAY 90 DAY MAY 23-27 MAY 25-MAY 31 JUN JUN-AUG ----------- ----------- -------- --------- Temperature: Below Below Precipitation: Above Above .... Medium and long range outlooks provided by NCEP/K. Thomas Priddy
UKAWC 8 Day Forecast Maps, TWC Jet, 15-Day Jet,Trend, Max/Mins (80k)
6 to 10 Day , 8 to 14 Day , Text, 30-Day Outook, 90-Day Outook, 120-Day Outlook
PRECIPITATION is not available
List of Kentucky Weather Stations (1st Order & Ag. stations) Rainfall
UKAWC Regional Ag Weather Summary (Select Format): Spring , Summer , Fall

Drought Status For JEFFERSON County, Kentucky
(Based on the latest Palmer Drought Severity and Crop Moisture Indices)
CENTRAL KY CLIMATE DIVISION Hydrological Drought (PDSI) Situation: ------------------------------------------------------------------------------------ Current Long-term Hydrological Moisture Status: NEAR NORMAL (PDSI= 0.18) Rainfall Needed: 0.00 inches ABOVE NORMAL Crop Moisture (CMI) Situation: ---------------------------------------------------------------------------------------------------------- Current Short-term Crop Moisture Status: Favorable For Normal Growth And Fieldwork (CMI= 0.17) Change From Previous Week: DRIER SOILS ( -0.08)
Note: Due to rainfall variability within each climate division, check Precip Reports/GIS Estimates and the Kentucky Climate Summary for the latest moisture information for this county.
Additional Drought Info.: UKAWC Drought Page

Kentucky CLIMATE summary not available.
Kentucky Climate Summaries: Last 3 days, 7 days, 14 days, 21 days, 30 days
Yesterday's Weather Data, Kentucky Climate Analysis, Kentucky Climate in Review (2005)
EUROPEAN CORN BORER DEGREE DAYS
CURRENT WESTERN CORN ROOTWORM DEGREE DAY TOTALS AND PREDICTED DATES FOR CERTAIN SPECIFIC VALUES. REAL data are used through 20250516 . Beyond 20250516 The nearest available weather station for Jefferson County is Louisville: , NORMAL data are used (adjusted by forecast values). --------- IMPORTANT DEGREE DAY VALUES -------- G E N E R A T I O N S CURRENT OVERWINTERING ------- FIRST ------ SECOND Louisville 805 AO AO AO NA NA NA
Note: A0 signifies already occurred.
European Corn Borer Accumulation Map
GIS ESTIMATES FOR JEFFERSON COUNTY
Valid July 29, 2013
The GIS estimates are derived by ARC/INFO GIS software for a central point in the county. The estimates are calculated from from 29 weather stations in the Kentucky area. Precipitation Estimates Last 3 Last 7 Last 14 Last 30 Since Days Days Days Days Jan 1 _______________________________________________________________________________ Precip Total 0.03 1.89 2.16 5.77 28.78 Precip Deviation -0.41 0.87 0.13 1.47 1.66 Temperature Estimates Last 3 Last 7 Last 14 Last 30 Days Days Days Days _____________________________________________________________________ Temp Average 71 74 79 77 Temp Deviation -5 -2 3 1 Soil Temperature Estimates Yesterday _________________________________________ Avg 4" Sod Soil Temp 76 European Corn Borer Degree Days Accumulations Degree Days Forecasted Accumulations Total 550 610 750 1660 1740 ____________________________________________________________ 2140 5/10 5/13 5/21 6/28 7/1

Almanac Information
Sunrise/Sunset/Moonrise/Moonset Computation (USN)
Yesterday's Weather Observation Report:
(liquid equivalent based on 7PM to 7PM observations.)

The nearest available weather station for Jefferson County is Louisville: AIR TEMP STATION MX MN PRECIP Bardstown 79 72 0.18 Berea 77 63 1.46 Louisville 81 63 0.65
Yesterday's U.S. Highs, Lows , KY's Highs/Lows/Precip, Daily Weather Data, Hourly Weather Data
Historical Weather And Climate Facts For Today

//////////////////////////// MAY 18TH...HISTORIC WEATHER EVENTS ...1825... A tornado (said to have crossed all of the state of Ohio) smashed into the log cabin settlement of Burlington, northeast of Columbus. (David Ludlum) ...1960... Salt Lake City UT received an inch of snow. It marked their latest measurable snowfall of record. (The Weather Channel) ...1980... Mount Saint Helens (in Washington State) erupted spewing ash and smoke sixty-three thousand feet into the air. Heavy ash covered the ground to the immediate northwest, and small particles were carried to the Atlantic coast. (David Ludlum)
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Ag Weather Center, Department of Biosystems & Agricultural Engineering, University of Kentucky